class_docstr: Singleton object containing the current renderer configurations
code: def __delitem__(self, key):
      # Remove template
      del self._renderers[key]
  
      # Check if we need to remove it as the default
      if self._default == key:
          self._default = None
  
imports: import textwrap
  from copy import copy
  import os
  from packaging.version import Version
  from plotly import optional_imports
  from plotly.io._base_renderers import MimetypeRenderer, ExternalRenderer, PlotlyRenderer, NotebookRenderer, KaggleRenderer, AzureRenderer, ColabRenderer, JsonRenderer, PngRenderer, JpegRenderer, SvgRenderer, PdfRenderer, BrowserRenderer, IFrameRenderer, SphinxGalleryHtmlRenderer, SphinxGalleryOrcaRenderer, CoCalcRenderer, DatabricksRenderer
  from plotly.io._utils import validate_coerce_fig_to_dict
label_desc: Use image node_id 7 for calling the RenderersConfig obj's underlying member method code with example usage: obj.__delitem__(key) without return types